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A new route for the synthesis of CuIn0.5Ga0.5Se2 powder for solar cell applications |
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| Authors: | Emre Yassitepe G. Hassnain Jaffari Sonia Zulfiqar Muhammad Ilyas Sarwar Syed Ismat Shah |
| Affiliation: | a Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA b Department of Physics, Beni-Suef University, Salah Salem Street, Beni-Suef- 62111, Egypt c Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA d Department of Mechanical Engineering, National Pingtung University of Science and Technology, Pingtung 912, Taiwan e Department of Chemistry, Quaid-e-Azam University, Islamabad, Pakistan |
| Abstract: | In this paper, a new and simple method is described that does not use an autoclave to synthesize copper indium gallium diselenide (CuIn0.5Ga0.5Se2) particles from the constituent elements. The process also does not require a post-synthesis selenization step. A solvo-thermal route is followed in which the constituent element powders are dissolved and made to react in a solvent such as ethylenediamine (ED), or triethylenetetramine (TETA). Crystal structure, morphology, composition, and particle size distribution of prepared particles were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), and dynamic light scattering (DLS), respectively. The band gap energies of the prepared particles were determined using an UV-VIS-NIR spectrophotometer. The results indicate that the solvent temperature and the synthesis time significantly affect the formation of single-phase CuIn0.5Ga0.5Se2 and the crystallinity of the particles. Further, the measured band gap energy for the prepared particles is close to that of the bulk material. For example, the single-phase plate-like CuIn0.5Ga0.5Se2 particles with an average particle size of 413.9 nm which can be successfully synthesized at a temperature of 250 °C in 15 h, have a band gap energy of 1.15 eV. |
| Keywords: | Copper indium gallium diselenide particles Solvo-thermal route Single phase Band gap energy |
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